HP Serviceguard Storage Management Suite Version A.02.00 for HP-UX 11i v3 Release Notes, 3rd Edition, November 2008

subsequent CFS command operations on the file system or the Serviceguard packages. Use of
HP-UX mount commands will not create an appropriate multi-node package, which means
cluster packages will not be aware of file system changes. Instead, use the CFS commands
cfsmount or cfsumount.
Guidelines for CFS Nested Mounts
A maximum of four levels of nesting is supported with CFS nested mounts. VxFS, Check Point
(ckpt), and snapshot cluster file systems are supported with CFS nested mounts. However, ckpt
and snapshot cluster file systems can only be mounted at the end of the nesting sequence, not
at the beginning or middle of the nesting sequence. CFS admin scripts changes: With the nested
mount point feature enabled, the only change in the cfsmntadm add command interface is to
specify a nested mount point in place of a normal mount point. For example:
cfsmntadm add <shared_disk_group> <shared_volume> <mount_point>
[<package_name>] <node_name>= [<mount_options>]... is now changed to:
cfsmntadm add <shared_disk_group> <shared_volume>
<mount_point/nested_mount_point> [<package_name>] <node_name>=
[<mount_options>]...
Use Case Examples
• Creating a mount point that is not nested:
cfsmntadm add cvm_dg1 lvol1 /cfs1 all=rw
• Creating a nested mount point:
cfsmntadm add cvm_dg1 lvol2 /cfs1/cfs2 all=rw (assuming cvm_dg1/lvol1
is already mounted on /cfs1, /cfs1/cfs2 becomes a nested mount point)
• Creating a ckpt nested mount point:
cfsmntadm add ckpt ckpt1 /cfs1 /cfs1/ckpt1 all=ro (if /cfs1 is a CFS mount
point, /cfs1/ckpt1 becomes a nested mount check point)
• Creating a snapshot nested mount point:
cfsmntadm add snapshot cvm_dg1 lvol3 /cfs1 /cfs1/snapshot1 snapshot1
all=ro (if /cfs1 is a CFS mount point, /cfs1/snapshot1 becomes a nested snapshot
mount point)
Serviceguard Limitations with CFS
The following limitations apply to the HP Serviceguard Product when it is used with Veritas™
CFS.
• Serviceguard supports a maximum of eight CFS nodes per site, up to a maximum of sixteen
CFS nodes across two sites. Serviceguard sites can be configured using the SITE_NAME and
SITE parameters only in a site-aware disaster-tolerant cluster.
See the HP Serviceguard Version A.11.18 Release Notes available at:
http://www.docs.hp.com/en/ha.html#Serviceguard for more information.
Removing a Node from a CFS Cluster
The following example illustrates how you would remove one node (node2) from a cluster
consisting of two CFS nodes (node1 and node2):
36 HP Serviceguard Storage Management Suite Version A.02.00 for HP-UX 11i v3 Release Notes